Corrosion cracking of gas-carrying pipelines

Journal Article · Wed Feb 01 00:00:00 EST 1989 · Mater. Performance; (United States)

OSTI ID:6312748

Hussain, K; Shaukat, A; Hassan, F

Samples of soil and other materials adhering to the outer and inner surfaces of pipeline coatings, and pieces of rupture pipe were studied to investigate causes of gas-carrying pipeline failures in Pakistan. Chemical analysis of the ruptured pipe shows the pipeline steel had no material flaw. X-ray diffraction studies of the soil reveal that it contains clay and nonclay minerals normally found. The material adhering to the coating facing the pipeline surface contains carbonates and bicarbonates of sodium, namely, nahcolite and trona. This study shows that nahcolite and trona, as products of cathodic protection that were then synthesized in the vicinity of the pipeline surface, could have attacked the pipe surface over the years and caused corrosion.

• Research Organization: Univ. of the Punjab, Lahore (PK); Dept. of Metallurgical Engineering and Material Science, Univ. of Engineering and Technology, Lahore (PK)
• OSTI ID: 6312748
• Journal Information: Mater. Performance; (United States), Vol. 28:2
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
36 MATERIALS SCIENCE
42 ENGINEERING
CORROSION
MONITORING
NATURAL GAS
PIPELINES
CRACKING
CARBONATES
CHEMICAL REACTION KINETICS
CLAYS
DESIGN
FAILURES
MINERALS
PAKISTAN
PROTECTIVE COATINGS
X-RAY DIFFRACTION
ASIA
CARBON COMPOUNDS
CHEMICAL REACTIONS
COATINGS
COHERENT SCATTERING
DECOMPOSITION
DEVELOPING COUNTRIES
DIFFRACTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
KINETICS
OXYGEN COMPOUNDS
PYROLYSIS
REACTION KINETICS
SCATTERING
THERMOCHEMICAL PROCESSES
032000* - Natural Gas- Transport
Handling
& Storage
360105 - Metals & Alloys- Corrosion & Erosion
360103 - Metals & Alloys- Mechanical Properties
420205 - Engineering- Transport & Storage Facilities- (1980-)